gps knowledge

Here are some abbreviations you’ll see when you are reading about a GPS receivers, navigators, handhelds, etc…

WAAS - Wide Area Augmentation System

SA - Selective Availability

TMC - Traffic Message Channel

NMEA (0183 Standard) - National Marine Electronics Association

DMB - Digital Multimedia Broadcasting

TTFF - Time To First Fix

TPEG - Transport Protocol Experts Group

A-GPS - Assisted GPS

DR - Dead Reckoning